Re: [PATCH v2 00/22] Start aligning perf test with kunit style
From: Ian Rogers
Date: Wed Oct 20 2021 - 11:51:22 EST
On Wed, Oct 20, 2021 at 5:14 AM Jiri Olsa <jolsa@xxxxxxxxxx> wrote:
>
> On Wed, Oct 13, 2021 at 10:45:42AM -0700, Ian Rogers wrote:
> > Perf test uses its own structs and code layout that differs from kunit
> > that was more recently introduced to the kernel. Besides consistency,
> > it is hoped that moving in the direction of kunit style will enable
> > reuse of infrastructure like test output formatting for continuous
> > testing systems. For example:
> > https://lore.kernel.org/linux-kselftest/CA+GJov6tdjvY9x12JsJT14qn6c7NViJxqaJk+r-K1YJzPggFDQ@xxxxxxxxxxxxxx/
> >
> > The motivation for this restructuring comes from wanting to be able to
> > tag tests with a size:
> > https://lore.kernel.org/linux-perf-users/CAP-5=fWmGyuqFKc-EMP3rbmTkjZ3MS+YSajGZfeRMc38HS82gw@xxxxxxxxxxxxxx/
> > To have more exhaustive and slower running tests. This isn't
> > something kunit currently supports, nor is the execution of python and
> > shell tests, but it seems sensible to work on an approach with kunit
> > rather to invent a new wheel inside of perf.
> >
> > These initial patches are just refactoring the main test suite
> > definitions to be in a more kunit style. Kunit isn't depended upon, it
> > is hoped that this can be done in later patches for the sake of
> > consistency.
> >
> > v2. Gets to a point of the perf test test suite/case structs being
> > close facsimiles of the kunit ones. It also addresses feedback on
> > the v1 RFC, in particular from Jiri Olsa <jolsa@xxxxxxxxxx>.
>
> hi,
> when I compile with DEBUG=1 it's ok, but with just make:
>
> [root@krava perf]# ./perf test
> Segmentation fault (core dumped)
> [root@krava perf]# gdb ./perf
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> Reading symbols from ./perf...
> (gdb) r test
> Starting program: /home/jolsa/kernel/linux-perf/tools/perf/perf test
> [Thread debugging using libthread_db enabled]
> Using host libthread_db library "/lib64/libthread_db.so.1".
>
> Program received signal SIGSEGV, Segmentation fault.
> __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:96
> 96 VPCMPEQ (%rdi), %ymm0, %ymm1
> Missing separate debuginfos, use: dnf debuginfo-install bzip2-libs-1.0.8-4.fc33.x86_64 cyrus-sasl-lib-2.1.27-6.fc33.x86_64 elfutils-debuginfod-client-0.185-2.fc33.x86_64 elfutils-libelf-0.185-2.fc33.x86_64 elfutils-libs-0.185-2.fc33.x86_64 keyutils-libs-1.6.1-1.fc33.x86_64 krb5-libs-1.18.2-31.fc33.x86_64 libbabeltrace-1.5.8-3.fc33.x86_64 libbrotli-1.0.9-3.fc33.x86_64 libcap-2.48-2.fc33.x86_64 libcom_err-1.45.6-4.fc33.x86_64 libgcc-10.3.1-1.fc33.x86_64 libidn2-2.3.2-1.fc33.x86_64 libnghttp2-1.43.0-1.fc33.x86_64 libpsl-0.21.1-2.fc33.x86_64 libselinux-3.1-2.fc33.x86_64 libssh-0.9.6-1.fc33.x86_64 libunistring-0.9.10-9.fc33.x86_64 libunwind-1.4.0-4.fc33.x86_64 libuuid-2.36.1-1.fc33.x86_64 libxcrypt-4.4.26-2.fc33.x86_64 numactl-libs-2.0.14-1.fc33.x86_64 openldap-2.4.50-5.fc33.x86_64 openssl-libs-1.1.1l-2.fc33.x86_64 pcre-8.44-2.fc33.x86_64 perl-libs-5.32.1-471.fc33.x86_64 popt-1.18-2.fc33.x86_64 python2.7-2.7.18-15.fc33.x86_64 slang-2.3.2-8.fc33.x86_64 xz-libs-5.2.5-4.fc33.x86_64 zlib-1.2.11-23.fc33.x86_64
> (gdb) bt
> #0 __strlen_avx2 () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:96
> #1 0x00000000004a3848 in __cmd_test (skiplist=0x0, argv=0x7fffffffd6c0, argc=0) at tests/builtin-test.c:150
> #2 cmd_test (argc=0, argv=0x7fffffffd6c0) at tests/builtin-test.c:628
> #3 0x00000000004cc47b in run_builtin (p=p@entry=0xa7cda8 <commands+552>, argc=argc@entry=1, argv=argv@entry=0x7fffffffd6c0) at perf.c:313
> #4 0x00000000004397ae in handle_internal_command (argv=0x7fffffffd6c0, argc=1) at perf.c:365
> #5 run_argv (argv=<synthetic pointer>, argcp=<synthetic pointer>) at perf.c:409
> #6 main (argc=1, argv=0x7fffffffd6c0) at perf.c:539
> (gdb)
Thanks, I'll take a look.
> also during the metric test (in make DEBUG=1 build) it runs the
> perf bench synthesize and it takes forever ;-)
>
> 89: perf all metrics test
>
> that might be another patchset I haven't checked,
> but I thought we already agreed not to do that ;-)
The PMU test was merged, and that may be the very slow running one.
The metric tests run with /bin/true, but if they get "not counted" in
the output they try again with perf bench. It generally runs in
O(seconds) for me, but maybe it is slower on a loaded machine. There
may be some middle sized thing between "perf bench" and true that
gives us enough counts for the tests.
Thanks,
Ian
> jirka
>
> >
> > v1. Built/tested on x86.
> >
> > Ian Rogers (22):
> > perf test: Use macro for "suite" declarations
> > perf test: Use macro for "suite" definitions
> > perf test: Make each test/suite its own struct.
> > perf test: Move each test suite struct to its test
> > perf test: Rename struct test to test_suite
> > perf test: Add helper functions for abstraction.
> > perf test: Add test case struct.
> > perf test: Add skip reason to test case.
> > perf test: Convert pfm tests to use test cases.
> > perf test: Convert pmu event tests to test cases.
> > perf test: Convert watch point tests to test cases.
> > perf test: Convert clang tests to test cases.
> > perf test: Convert bpf tests to test cases.
> > perf test: Convert llvm tests to test cases.
> > perf test: Remove now unused subtest helpers
> > perf test: bp tests use test case
> > perf test: Convert time to tsc test to test case.
> > perf test: Remove non test case style support.
> > perf test: BP tests, remove is_supported use
> > perf test: TSC test, remove is_supported use
> > perf test: Remove is_supported function
> > perf test: Remove skip_if_fail
> >
> > tools/perf/arch/arm/include/arch-tests.h | 2 +-
> > tools/perf/arch/arm/tests/arch-tests.c | 18 +-
> > tools/perf/arch/arm/tests/vectors-page.c | 2 +-
> > tools/perf/arch/arm64/include/arch-tests.h | 2 +-
> > tools/perf/arch/arm64/tests/arch-tests.c | 11 +-
> > tools/perf/arch/powerpc/include/arch-tests.h | 2 +-
> > tools/perf/arch/powerpc/tests/arch-tests.c | 12 +-
> > tools/perf/arch/x86/include/arch-tests.h | 14 +-
> > tools/perf/arch/x86/tests/arch-tests.c | 46 +-
> > tools/perf/arch/x86/tests/bp-modify.c | 2 +-
> > tools/perf/arch/x86/tests/insn-x86.c | 2 +-
> > tools/perf/arch/x86/tests/intel-cqm.c | 2 +-
> > .../x86/tests/intel-pt-pkt-decoder-test.c | 2 +-
> > tools/perf/arch/x86/tests/rdpmc.c | 2 +-
> > tools/perf/arch/x86/tests/sample-parsing.c | 2 +-
> > tools/perf/tests/api-io.c | 6 +-
> > tools/perf/tests/attr.c | 4 +-
> > tools/perf/tests/backward-ring-buffer.c | 4 +-
> > tools/perf/tests/bitmap.c | 4 +-
> > tools/perf/tests/bp_account.c | 36 +-
> > tools/perf/tests/bp_signal.c | 34 +-
> > tools/perf/tests/bp_signal_overflow.c | 9 +-
> > tools/perf/tests/bpf.c | 69 ++-
> > tools/perf/tests/builtin-test.c | 578 ++++++------------
> > tools/perf/tests/clang.c | 54 +-
> > tools/perf/tests/code-reading.c | 4 +-
> > tools/perf/tests/cpumap.c | 10 +-
> > tools/perf/tests/demangle-java-test.c | 4 +-
> > tools/perf/tests/demangle-ocaml-test.c | 4 +-
> > tools/perf/tests/dlfilter-test.c | 4 +-
> > tools/perf/tests/dso-data.c | 10 +-
> > tools/perf/tests/dwarf-unwind.c | 5 +-
> > tools/perf/tests/event-times.c | 4 +-
> > tools/perf/tests/event_update.c | 4 +-
> > tools/perf/tests/evsel-roundtrip-name.c | 5 +-
> > tools/perf/tests/evsel-tp-sched.c | 5 +-
> > tools/perf/tests/expand-cgroup.c | 6 +-
> > tools/perf/tests/expr.c | 4 +-
> > tools/perf/tests/fdarray.c | 7 +-
> > tools/perf/tests/genelf.c | 6 +-
> > tools/perf/tests/hists_cumulate.c | 4 +-
> > tools/perf/tests/hists_filter.c | 4 +-
> > tools/perf/tests/hists_link.c | 4 +-
> > tools/perf/tests/hists_output.c | 4 +-
> > tools/perf/tests/is_printable_array.c | 4 +-
> > tools/perf/tests/keep-tracking.c | 4 +-
> > tools/perf/tests/kmod-path.c | 4 +-
> > tools/perf/tests/llvm.c | 74 ++-
> > tools/perf/tests/maps.c | 4 +-
> > tools/perf/tests/mem.c | 4 +-
> > tools/perf/tests/mem2node.c | 4 +-
> > tools/perf/tests/mmap-basic.c | 4 +-
> > tools/perf/tests/mmap-thread-lookup.c | 4 +-
> > tools/perf/tests/openat-syscall-all-cpus.c | 5 +-
> > tools/perf/tests/openat-syscall-tp-fields.c | 5 +-
> > tools/perf/tests/openat-syscall.c | 5 +-
> > tools/perf/tests/parse-events.c | 4 +-
> > tools/perf/tests/parse-metric.c | 4 +-
> > tools/perf/tests/parse-no-sample-id-all.c | 5 +-
> > tools/perf/tests/pe-file-parsing.c | 6 +-
> > tools/perf/tests/perf-hooks.c | 4 +-
> > tools/perf/tests/perf-record.c | 4 +-
> > tools/perf/tests/perf-time-to-tsc.c | 30 +-
> > tools/perf/tests/pfm.c | 63 +-
> > tools/perf/tests/pmu-events.c | 73 +--
> > tools/perf/tests/pmu.c | 4 +-
> > tools/perf/tests/python-use.c | 4 +-
> > tools/perf/tests/sample-parsing.c | 4 +-
> > tools/perf/tests/sdt.c | 6 +-
> > tools/perf/tests/stat.c | 11 +-
> > tools/perf/tests/sw-clock.c | 4 +-
> > tools/perf/tests/switch-tracking.c | 4 +-
> > tools/perf/tests/task-exit.c | 4 +-
> > tools/perf/tests/tests.h | 238 ++++----
> > tools/perf/tests/thread-map.c | 10 +-
> > tools/perf/tests/thread-maps-share.c | 4 +-
> > tools/perf/tests/time-utils-test.c | 4 +-
> > tools/perf/tests/topology.c | 4 +-
> > tools/perf/tests/unit_number__scnprintf.c | 4 +-
> > tools/perf/tests/vmlinux-kallsyms.c | 5 +-
> > tools/perf/tests/wp.c | 122 +---
> > tools/perf/util/c++/clang-c.h | 8 +-
> > tools/perf/util/c++/clang-test.cpp | 6 +-
> > 83 files changed, 811 insertions(+), 966 deletions(-)
> >
> > --
> > 2.33.0.882.g93a45727a2-goog
> >
>